通过伽马辐照合成的 Pt/TiO2 纳米粒子可提高可见光下甲基橙的光催化降解能力

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-13 DOI:10.1016/j.nimb.2024.165560

Vo Thi Thu Nhu , Van-Thuc Nguyen

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引用次数: 0

摘要

本研究利用钴-60放射源发出的伽马射线，通过辐射分解法制备了铂修饰TiO2纳米粒子。通过X射线衍射（XRD）、X射线光电子能谱（XPS）、场发射扫描电子显微镜（FESEM）、能量色散X射线能谱（EDX）、高分辨率透射电子显微镜（HRTEM）和带隙能测定了铂修饰TiO2纳米粒子（Pt/TiO2）的特性和形貌。结果表明，TiO2 表面存在 Pto，且 Pt/TiO2 催化剂的带隙低于纯 TiO2。研究了 Pt/TiO2 纳米颗粒在可见光下光催化降解甲基橙（MO）20 ppm 的情况。掺杂 1%wt Pt 的 TiO2 样品对 MO 的降解效率最高；在可见光照射两小时后，Pt1.0/TiO2 样品对 MO 的降解效率几乎是纯 TiO2 样品的两倍。此外，还研究了材料用量、溶液 pH 值和染料浓度以及 Pt/TiO2 纳米粒子的可重复使用性等因素。

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Pt/TiO2 nanoparticles synthesized via gamma irradiation to improve photocatalytic degradation of methyl orange in visible light

This study prepared Pt modification on TiO₂ nanoparticles by radiolysis method using gamma-ray from the Co-60 source. Characteristic properties and morphology of Pt-modified TiO₂ NPs (Pt/TiO₂) were determined through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HRTEM) and band gap energy. The results indicated the existence of Pt^o on the surface TiO₂, and the band gap of Pt/TiO₂ catalysts was lower than pure TiO₂. Photocatalytic degradation methyl orange (MO) 20 ppm of Pt/TiO₂ nanoparticles was investigated under visible light. The TiO₂-doped 1 %wt Pt sample has the highest MO degradation efficiency; the MO degradation efficiency of the Pt_1.0/TiO₂ sample was nearly twice that of using pure TiO₂ under visible irradiation for two hours. Besides, the factors of the amount of material used, solution pH and dye concentration, and reusability of Pt/TiO₂ nanoparticles were also investigated.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.